Qualitative aspects, purpose ethics, values.
Now, you can of course have people self-report and collect thag data, and you can measure for certain pre-determined criteria, and you can make rational judgments and interpretations based on the data, but these things are not directly measurable or quantifiable in themselves.
Furthermore you can’t apply the scientific method to it’s own presuppositions regarding causality without making a circular argument.
Physics and physical models are also in themselves mathematical abstractions of reality, not reality itself. Same with chemistry, etc… Things are boiled down to values which can be plugged into formulas, and it is instrumentally useful, and I would say even structurally real about reality, but they are no more capturing the full reality being modeled than does the blueprint of a building capture all there is about the building itself. And this paragraph isn’t just a matter of me being an Aristotlean with an axe to grind. Philisophers like Bertrand Russell and Alfred North Whitehead have made the same point.